UV filters something many photographer takes for granted or think will affect their images when out in the field,I had previously purchased the K&N Adjustable ND filter that does away with the cross effect you normally get and I was so impressed I thought I would try out one of their UV filters to see how well it holds up to some of my others, first thing you will notice is that it is very slim "ultra Slim" Double threaded yet only 3mm in depth impressive indeed.you will also notice right away that it has some coating on the glass which blocks and prevents the harmful effects of UV rays and eliminates haze that can register a bluish cast from scenic shots.One if the most important features for me was to see if the claim that it does not affect image quality was true as many other filters have some slight effect on sharpness, and to do this I got the back of the box from the uv filter which has a high contrast of black and white and also had a light opposite and one to the right to test for glare effects, The result which I have posted down below, which was extremely impressive, I zoomed in at 100% and could not see any major effects to my image quality, least to say that with my own eyes I could not see any negative effect to the quality.I will let the photos speak for themselves.you will hear a lot of people say UV filters are pointless and maybe so with lower quality ones but I have had a uv filter save my 16-35mm lens when it fell, I also use them for my fitness shoots which I shot in a warehouse with loads of dust and when I use smoke grenades this prevents small particles entering the lens as well as settling on my elements.this filter also has notches to make it easier to unscrew, i know this is a nice welcome for me as i have to carry a flat balloon with me in my bag to help grip some of my others when they get stuck.below you will see two other filters which i have stacked next to the K&F concept these are also meant to be slim line, you will be able to see the difference in thickness and quality.Last but no means least the last two images are the before and after the filter was attached to prove that image quality is not effected.For £7 you have nothing to lose and lots to gain trust me :)

I needed a UV filter for my Canon 24-70mm lens. The filter is good fit. The quality of the glass is outstanding. The filter comes in a plastic container which provides protection when I take the filter off lens and store in my camera bag. This protects the filter from scratches when not in use.

Not a bad little filter, but did experience a weird fogging on the glass when I first installed this filter but after 3 with a microfibre cloth and lens cleaner seemed to have sorted the problem. Picture quality is ok but compared to my Hoya filters it’s not as sharp, but it’s marginal to honest.

New camera, new lenses so I needed the extra protection offered by a UV filter. I trust the brand so bought this one (and another size too). Happy with my purchase.

I think that this is another great offering from K&F Concept, the filter is blemish free and fits perfectly on the lens, with the thread making it a quick process to put on and remove if required. I have bought several Lee and Cokin filters in the past and this seems to offer just as good service as the more expensive brands

Very Good Protection for my Sony lens . Need to order another one for my second mainly used lens. Very happy with the purchase .

So far so good. Time will tell

Well made fits perfectly well.

I like the quality and the thinness of this filter. It doesn't add too much to the front of the lens and offers a good way to protect your expensive lens from having to be cleaned. Good value too.

good filter for my nikon 24-70 z f2.8.. thin and fits well on the lens.